In this paper is presented tracing the chromaticity diagram of colour by a system of triaxial coordinates may describe the relationship among the three parameters of a colour more accurately and conveniently than the planar rectangular coordinates.
这些缺陷是平面直角座标所固有的，无法克服的，本文首次提出了一种新的座标系统——平面三轴座标系统，可用来绘制颜色色品图，这样的色品图能确切描述三个参数的变化关系，而且使用方便。
Algorithm for the coordinate of indicator and signal;
警冲标信号机座标的通用算法